package com.qixiucoding.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Component;

import java.util.Map;

/**
 * SpringBean获取
 *
 * @Author longhj
 * @Date 2021/10/30 星期六 20:34
 */
@Component(value = "springContextUtil")
public class SpringContextUtil implements ApplicationContextAware {
    private static ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }
    /**
     * 获取applicationContext
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }


    /**
     * 通过name获取 Bean
     *
     * @param name
     * @return
     */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }


    /**
     * 通过class获取Bean
     *
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }


    /**
     * 通过name,以及Clazz返回指定的Bean
     *
     * @param name
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
    /**
     * 通过interface.class,获取实现了接口的实例
     *
     * @param <T>  Map<String, T>
     * @param clazz
     * @return
     */
    public static <T> Map<String, T> getBeanByInterface(Class<T> clazz) {
        return getApplicationContext().getBeansOfType(clazz);
    }

}
